Pen



FIG. 1 is a perspective view of a pen of the present invention.

FIG. 2 is a front elevational view thereof.

FIG. 3 is a left side elevational view thereof; the right side elevational view is a mirror image of the left side.

FIG. 4 is a rear elevational view thereof.

FIG. 5 is a top plan view thereof.

FIG. 6 is a bottom plan view thereof; and,

FIG. 7 is an exploded perspective view thereof.

The broken lines showing the grip, writing tip housing and writing tip in FIG. 7 are included for the purpose of showing portions of the pen that form no part of the claimed design. 

The ornamental design for a pen, as shown and described. 